>From Aristotle?

apparently not, actually:

"The earliest that this quotation appears in print is in Religion and the Pursuit of Truth (1959) by Lowell Bennion."

or

"First attributed to Aristotle in Lowell L. Bennion, Religion and the Pursuit of Truth (1959). Unfound as such.

Sometimes thought (though I feel it's a bit of a stretch) a misinterpretation of Nicomachean Ethics 1.3.4 (1094b): "For it is the mark of an educated person to search for the same kind of clarity in each topic to the extent that the nature of the matter accepts it.""

Maybe, yes "maybe" Robert got inspiration from a guy who lived two thousands years earlier.